Electric-arc lamp.



'No. 851,003. PATENTED APR. 23, 1907.

0. (moss. ELECTRIC ARC LAMP.

APPLIOATION FILED DEG. 20, 1904.

4 SHEETS SHEET 1.

III

F/C-l.

WITNESSES. INVENTOR.V

(9&5 QWOSS kig gitorne 44 Q W No. 851,003. PATENTED APR. 23, 1907.

0. GROSS.

ELECTRIC ARC LAMP.

APPLICATION FILED DEC. 20, 1904.

4 SHEETS-SHEET 2.

WITNESSES. INVENTOR.

I (Otto gross.

PATENTED APR. 23, 1907.

0. GROSS.

ELECTRIC ARC LAMP.

APPLICATION FILED DBO. 20. 1904.

4 SHEETS-SHEET 3.'

INV ENTOR. (Otto ross w rru E55 es.

No. 851,003. PATENTED APR. 23, 1907. O. GROSS.

ELECTRIC ARC LAMP.

APPLICATION FILED DEC. 20, 1904.

4 SHEETS-SHEET 4.

INVENTOR.

(91317 TOSS WITNESSES.

UNITED STATES PATENT OFFICE.

ELECTRIC-ARC LAMP.

Specification of Letters Patent.

iratented April 23, 1907.

Application filed December 20,1904. Serial No. 237,689.

To all whom it may concern.-

Be it known that I, O'r'ro Games, a subject of the Emperor of Germany, of The Otto Electrical Manufacturing Company, Limited, residing at 504 Stockport road, Longsight, Manchester, in the county of Lancaster, England, electricalengineer, have invented cer tain new and useful Improvements in Electric-Arc Lamps, (for which I have made an application for patent in Great Britain, No. 21,242, dated October 4, 1904,) of which the following is a specification.

My invention relates to electric-arc lamps, and particularly arcstriking mechanism.

Under this invention I utilize carbons carried in tubes which converge one toward the other, the are extending between the ap-- proaching extremities, as is known.

I now proceed to describe my invention in detail and with the help of the annexed sheets of drawings, first pointing out the nature of the figures in the drawings.

Figure 1 is a vertical elevation, partly in section, of a converging carbon-lamp. Fig. 2 shows an elevation of the lamp at right an gles to the position in Fig. 1. Fig. 2 shows a detail. Fig. fl is an enlar ed explanatory view oi the lower part of thelamp and shows the carbons, moving tubes, and clutches, the latter having clutched the carbons and retracted same. Fig i is also an enlarged explanatory view similar to Fig. 3, but with the clutches disengaged and showing the carbons entirely released and resting on the arcmg plate.

n lamps according to this present invention I preferably use converging carbon-tubes a b and I arrange for such converging tubes or art thereof to slide or reciprocate or to be de ected angularly, either movement serving my purpose. In the lamp shown in the drawings the converging tubes a b have telescopic portions a b, which slide upon or within the upper portions of the carbom tubes a b. Upon the tubes c b the clutches C O are arranged, and these are so designed. as to grip the carbons and retract same and move with them until the carbons are re leased by disen agement of the clutches. The clutches C C shown in the drawings) con sist of small eccentrics or cams or disks (1 d, which are pivoted at points d d to small cli or other brackets e e, which clip the slidab e tubes 0/ b, or are otherwise secured thereto. These eccentrics or cams d d, of

which there are two to each carbon, (see' Figs. 2 and 2,) have preferably a milled or serrated periphery slightly concaved, and they are disposed in jaws in the brackets c e opposite slots a formed in the tubes (1 I), (see Fig. 3,) so as to be able to bearv on each carbon at two points at the required times for the purpose of gripping same. Each eccentric or cam 11 d, pivoted at the points (1 d, is jointed at the points (i d by small pivotpins or otherwise to links f, which are in turn adjustably connected to a cross-head, such as g, which cross-head may have horns or extensions g, which, embracing the tubes a b, assist in guiding such cross-head in its up-and-down movements.

When the cross-head g is raised, it pulls the linksf, which turn each eccentric or cam'd d on its pivots d d and force a part of the periphery of the eccentrics or cams into contact with the carbons, so that the carbons are held. immediately the carbons are gripped or clutched the eccentrics and clip-brackets e e begin to rise, and with them the tubes a b, which telescope within the other tubes at b, and so the carbons are retracted. When the cross head and the link attachment begin to fall, the telescopic tubes at b and brackets fall too, and with them the clutches gripping the carbons, the whole of the parts falling bodily, and this takes place until the lower edges of the tubes at I) encounter the base of the lamp or other abutments, such as c a. Upon this occurring the further descent of such tubes is arrested and the weight of the thrown on the pivot-pins d (1 and so the eccentrics are turned downward upon their pivots d d, and in this manner the gripping portions of the eccentrics are moved away from contact with the carbons, which are consequently released and fall onto the arcing plate A.

The way in which the cross-head, such as g, is controlled may vary considerably j but ll prefer to work by means of one or more solenoids or coils or by a combination of solenoids or coils. in the Figs. 1 and 2 I have shown the cross head g connected to a movable and adjustable core it, (having a dash-pot It) the action of the core being governed by a coil Theccii "L shown consists of a series coil 3 with a superimposed shunt-coil s. The action of such coil i, core 7L, and arrangement of mechanism is as follows: When the current is first switched on, the series coil 8 is strongly energized and sucks up the core h cross-head, links, and connected parts 1s and cross-head g, and this latter in turn acts on the links marked f and causes same to pull the eccentrics into contact with the carbons, which are now firmly clutched, so that with the further ascent of the core the whole of the parts move upward together. (See more particularly Fig. 3.) Thus the carbons are retracted and the lamp kept burning. As consumption of the carbons take place the shunt-coil 3 becomes a little stronger and (being oppositely wound) neutralizes the series coil 8, and so the core falls a little, and consequently the whole of the moving parts appertaining to the carbons. As soon as the shunt-coil 8 becomes sufficiently strong to neutralize the series coil 8 to such an extent as to allow the core and cross-head g to fall sufiiciently to permit the tubes at bto encounter the abutments it (see Fig. 4) the eccentrics release the carbons. (See Figs. 1 and 4.) lVhen this occurs, the carbons immediately fall onto the arcing plate A, whereupon the series coil again sucks up the core and the carbons are clutched and retracted.

I arrange that when the carbons are released the arcing-plate A shall be always be-- low in a position to receive them, and for this purpose I work such arcing plate from the cross-head, so that the position of the crosshead governs the position of the arcing-plate 1 In the drawings an adjustable extension or turnbuckle 70 from the cross-head 9 works a i link Z, acting on a bell-crank lever m, pivoted at m to a t ered bracket n, and this bell-crank lever m is connected by a swivel 0 to a pin on the arm 29, which works the vertical rod g, I carrying the arcing plate A. The ver ical l rod is carried in a bearing 7* on the base oi the lamp. The construction of the parts such that every movement of the crossiiead ail'ccts the arcing plate to some extent, and when the downward movement is sul'licicut to bring the sliding tubes against the abn m l s then the arcing plvte is immediately below the carbons, just as when the carbons are tracted it is at once swung clear.

The current entering the lamp may pass through a blow-magnet (used to keep the flame a good shape) and then to the positive tube a and across to the negative tube Z) and thence through the series coil to the negative terminal, the shunt-coil s belng simply co nected across.

Though I have described certain mean for controlling the feeding of the carbons, I do not claim such means, as any other suitable means may be used for this purpose 1 declare that whai I claim is- In combination with arc-lamps having converging carbon-tubes, a moving arcing plate upon which the carbons fall, a connection from cross-head, a turnbuckle, a link, a bell-crank lever, a swivel connection and an arm, and a bearing for the arcing-plate sup-- port, said arcing plate being constantly a: d correspondingly influenced by a movement of the core.

In witnesses whereof I lia' her unto set my hand in presence of two witnesses.

Gil/

ALFRED Yarns. 

